package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDate;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus().equals(StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 将DTO转化为实体对象，然后保存到数据库
     * @param employee
     */
    @Override
    public void save(EmployeeDTO employee) {
        Employee e = new Employee();
        // 转化为实体
        BeanUtils.copyProperties(employee, e);
        // 为实体添加新的属性
            // 1. 设置默认密码
        e.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
            // 3. 设置状态
        e.setStatus(StatusConstant.ENABLE);
        // 调用mapper层保存
        employeeMapper.insert(e);
    }

    /**
     * 分页查询
     * @return
     */
    @Override
    public PageResult pageQuery(String name, Integer page, Integer pageSize) {
        // 开启分页查询
        PageHelper.startPage(page, pageSize);
        // 分页查询要求返回结果必须为Page类型
        Page<Employee> result = employeeMapper.pageQuery(name);
        return new PageResult(result.getTotal(), result.getResult());
    }

    /**
     * 更新员工状态
     * @param status
     * @param id
     */
    @Override
    public void updateStatus(Integer status, Long id) {
        // 创建一个实体对象再传参(通用性, 方便动态添加属性)

        // new的方式
//        Employee employee = new Employee();
//        employee.setId(id);
//        employee.setStatus(status);
        // builder的方式
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Long id) {
        Employee e = employeeMapper.getById(id);
        e.setPassword("******");
        return e;
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 将DTO转化为实体
        BeanUtils.copyProperties(employeeDTO, employee);
        // 还是调用万精油方法
        employeeMapper.update(employee);
    }

}
